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Finding the Fourth Proportional to 1,873.78, 2,810.26 and 641.18

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Solution

The fourth proportional to 1,873.78, 2,810.26 and 641.18 is: 961.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,873.78 : 2,810.26 = 641.18 : x
  2. Step 2: Convert to fraction form
    1,873.78/2,810.26 = 641.18/x
  3. Step 3: Cross multiply
    1,873.78x = 2,810.26 × 641.18
  4. Step 4: Simplify right side
    1,873.78x = 1,801,882.51
  5. Step 5: Solve for x
    x = 1,801,882.51/1,873.78
  6. Step 6: Final answer
    x = 961.63

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.